Markdown: Link text converted to lower-case

[IvanGoncharov]

Prettier 1.10.2
Playground link

--parser markdown

Input:

[1][Test Text](http://example.com)

Output:

[1][test text](http://example.com)

Expected behavior:

[1][Test Text](http://example.com)

[lydell]

Hi! I’m curious, what do those examples even mean? I’ve seen [link test](href) and [link text][ref] but not the combination of those.

[IvanGoncharov]

@lydell [1] is literal part and the whole sample rendered as:
[1]Test Text

Real-life use case from here: https://github.com/facebook/graphql/blob/master/rfcs/Subscriptions.md

[lydell]

Thanks! As a workaround, I believe you can add a \ at the beginning: \[1][Test Text](http://example.com).

I think what’s happening is that Prettier thinks that [1][Test Text] is the link (where it is valid to lowercase the ref) and that it is followed by some text in parentheses. I don’t know which is correct according to the CommonMark spec, though. Hopefully @ikatyang knows :)

[IvanGoncharov]

I don’t know which is correct according to the CommonMark spec, though.

@lydell It looks like CommonMark has the exact same behavior as GFM:
http://spec.commonmark.org/dingus/?text=%5B1%5D%5BTest%20Text%5D(http%3A%2F%2Fexample.com)

[ikatyang]

This is caused by remark mis-parsing, opened remarkjs/remark#324.

[rekmarks]

This is fixed by remark as of October 13, 2020, however it's coupled with a major release of all remark packages used by Prettier. Updating those packages seems like a job for someone pretty intimately familiar with unified, remark, and possibly micromark.

[TrevorBurnham]

I've created an issue to track the task of upgrading Prettier to remark-parse@9: #11828